Chronometric camera-shutter-operating device.



w. M. MARTIN & A. P. PETRI. QHBONOMBTRIC CAMERA SHUTTER OPERATING DEVICE.

APPLIUATION FILED JUNE 24, 1907. 91 6,346.

Patented Mar. 23, 1909.

I of the adjustable clamp WILLIAM M. MARTIN Ann ALBERT r. rarer, or sr. Louis, i irssounrf x CHRONOINEETBIC SAMBA-SHUTTER-OPEBATING DEVIE.

To all whom it may concern:

Be it known that we, W1LL1AM TIN and ALBERT P. Perm, both citizens of the United States, and residents of St. Louis,

Specification of Letters Patent. Application filed June 24, 1907.

M. Mare being bent upward to Missouri, have invented certain new and use- 1 ful Improvements in Chronometrlc Camera- Shutter-Operating Devices, 0 lowing is a specification containing a full, clear, and exact description, reference being had to the accompanying drawings, forming a parther eof. v Ourinvention camera shutter operating being to I rovide simple means adjustab y camera, and which operates chronometrically to open redeterrnined time after being set.

Our invention consists in a spring actuated train of gearing arranged in a suitable housing, and which latter is detachably .arranged on the camera, an arm detachably fixed to the shutter operating trigger, and a flexible connection between the arm and the spring actuated gearing.

Our invention further consists in certain novel features ,of construction and arrangement of parts, which will be hereinafter more fully set forth, pointed outin the claims, and illustrated in the accompanying drawings, in which I Figure 1 is a front elevation of a camera with our improved shutter operating deyice in position thereon; Fig. 2is an enlarged vertical section taken on the line2-2 of big. 1; Fig. 3 is a ers which is detao ab y crating trigger; Fig.

relates to a chronometric device, our object adapted tobe ective view 0 fixed to the shutter op- 4 is a pers utilize ably fixing the housing carrying for detachthe chronometric mechanism.

Referring by numerals to the accompanying drawings'.-1 designates the camera, 2 the lens thereof, and 3 the trigger, or finger, which actuates the shutter.

4 designates a finger which is detachably connected to the trigger 3, one end of said finger being bifurcated, as designated by5; and passing through said bifurcated end is a thumb screw '6, which draws the bifurcated ends of the finger together so as to clamp on the end of the trigger 3; and formed on the opposite end of this finger 4 is a hook 7.

A clamp which is detachably connected to the camera .1 comprises a pair of. narrow and detachablyI arranged on af which the folj ward,

the shutter of the camera at a f the finger k ective view Q lhe chronometric mechanism wit Patented March 23, 1909'.

Serial No. 330,445.

plates 8 form a hook 10; and passing through a slot 11 formed in the plate 9 is a set screw 12, which enters the plate 8, and thus rigidly connects said plates Sand 9.- The left hand end of the plate 8 is bent upand thence outward in a horizontal plane, as designated by 13; and formed in said portion 13 is a slot 14.

15 designates a housing, with the under side of which is formed integral a screw threaded shank 16, which latter passes through the slot 14 and receives a thumb nut 17, thus detachably connecting the housing to the plate 9 of the clamp. Arranged in the. center of the housing 15 is a shaft 18, on which is fixed a pinion 19,, and which is in mesh with a small pinion at the end of a train of gearing 20, and at the opposite end of said train of gearing is arranged an esca ement 21, of any ordinary construction. oosely mounted on the shaft 18, adjacent the pinion 19, is a lever 22, which extends through'a slot 23 formed in the side of the housing 15, and fixed to the underside of this lever 22v is a spring pawl 24, the point of which engages the teeth of the pinion 19. Secured/to the inside of the housing 15 is one end of a retractile coil spring 25, the opposite end being fixed t0 the central portion of the lever 22;

and 9, the outerend of the plate 8 A segmental plate 261s arranged against the inner face of the housing 15 so as to close the opening 23 therein, and formed in the center of this plate is an opening 27, through which the lever 22 projects. Fixed to the outer end of the lever 22 is one end of a flexible connection, such as a chain 28, the opposite end portion of which is adapted to be detachably connected to the hook 7 on the finger 4.

- When our improved attachment is arranged upon a camera, the finger 4Jis clamped to the end of the shutter operating trigger 3, and-the housing 15 is. arranged at the side of the camera by adjusting the clamp, com: prising the plates 8 and 9, and locking the sametogether by hln the housing 15 is now set for operation by elevating the lever 22, and stores power in the coil spring 25; and when the lever 22 is raised, the point of the spring pawl 24 successively so doing, gives teeth of the pinion 19; and, in an audible signal by clicking, thus providlng for the timing of the actuation of th' device.

means of the setscrew 12.

which action expands Y engages the lever v For instance, each tooth may represent a di- I vision of time, and'thus the operator can regulate the period of time at which the mechanism actuates the shutter by. varying the height to which the lever 22 is elevated. For instance, each tooth may represent a period of ten seconds, and if the lever 22 be elevated so that the point of the awl passes four teeth, the shutter will then be actuated at the expiration of forty seconds after the chrono'metrie mechanism has been set. After the mechanism'has been set for operation, the power stored in the'coil s ring 25 exerting a downward pull necessari y imparts slow rotary motion to the pinion 19, owing to the engagement of the pawl 24 with the teeth of! which the pin- I said pinion, and the speed at ion'- 19 travels is governed and regulated by the escapement 21, which is driven from said pinion 19 by the train of gearing 20.

hen the device is set for operation, the 22 is at its lowermost limit of movement against the lower end of the slot 23, and before engaging the upper portion of the chain on the hook 7, the finger 4 is moved downward to its lower limit of movement, after which the upper portion of the chain is engaged on the hook 7, with said chain in a taut condition, after which the lever 22 is moved upward the desired distance, and at the same time the end of the finger 4 moves upwardly a short distance until the trigger 3 resumes its normal position but the upward movement of the lever 22, and thus the chain is loose or slack when the device is set, and which slack is taken up by the reverse or downward movement of the lever 22. The lever 22 moving downward causes the chain 28 to' become taut, and, as soon as this action takes place, the down- I ward pull of the ever will be exerted on the outer end of the finger; and, as a result, the trigger 3 will be actuated to open the shutter. I Our improved device is applicable for all forms of cameras havingautomatic shutters, and nearly. all makes of hand cameras, is I readily attached or can be quickly t 1e corresponding movement ofthe finger is somewhat less than shutter, of chronometrically operated means detachably arranged on the camera adjacent the shutter, and a chain forming a connection between the shutter trigger and the chronometrically operated means.

2. The combination with a camera and its shutter, of ohronometrically operated means positioned on the camera adj accnt the shutter, and a chain connecting a movable portion of the chronometrically operated means and the shutter releasing trigger.

3. The combination with a camera and its shutter, of chronometrically operated means arran ed adjacent the camera, a finger detachafily connected to the shutter releasing trigger, and a chain connectin a movable portion of the chronometrimlly operated means and the end of the finger.

4. The combination with a camera and its shutter, of a clamp .detachably arranged on the camera, chronometrically operated means detachably arranged on the clamp, and a chain connecting the shutter releasing trigger and a movable portion of the chronometric ally o erated means.

5. X camera shutter operating device, comprising a chronometric mechanism, an arm actuated by said chronometric mechanism, and a chain connected to said armand adapted to be connected to the camera shutter.

6. The combination with a camera and. its shutter, of an arm dctachably connected to theshutter releasing trigger, a hook'formed on the end of said arm, a chronometric mechanism, an arm actuated by said chronometric mechanism, and a chain connected to said arm and to the hook on the arm carried by the shutter releasing trigger.

In testimony whereof, names to this specification, in presence of two subscribing Witnesses.

E. L. WALLACE.

We have signed our 

